The best way would be via various capture cards or tv tuner cards. There are numerous devices out there, both internal or USB based. What you get will depend on if you are willing to open up your computer (or pay somebody to open it up) and how much you want to spend.

Okay, you see what I want is to record some footage and obviously using a camera gives not the results I would like to see.
What method would you recommend me to use? Buy something like Dazzle or a DVD recorder?